MICRONICS COMPUTERS, INC. 486DX2 SYSTEM BOARD Processor 80486DX2 Processor Speed 50(internal)MHz Chip Set Micronics Max. Onboard DRAM 64MB Cache 64/256KB BIOS Phoenix Dimensions 330mm x 218mm I/O Options 32-bit external memory card NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location External battery J11 Reset switch W6 Speaker J23 Turbo switch W7 Keylock/power LED J24 32-bit external S1 memory card Turbo LED W5 USER CONFIGURABLE SETTINGS Function Switch Position » Factory configured-do not alter SW1/1 On » Factory configured-do not alter SW1/2 Off » Factory configured-do not alter SW1/3 Off » Factory configured-do not alter SW1/4 On » Factory configured-do not alter SW1/5 Off » Factory configured-do not alter SW1/6 Off » Factory configured-do not alter SW1/7 Off » Factory configured-do not alter SW1/8 Off » Factory configured-do not alter SW2/6 On » Factory configured-do not alter SW2/7 Off 64KB External cache select SW2/8 Off 256KB External cache select SW2/8 On DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (4) 256K x 9 NONE NONE NONE 2MB (4) 256K x 9 (4) 256K x 9 NONE NONE 3MB (4) 256K x 9 (4) 256K x 9 (4) 256K x 9 NONE 4MB (4) 256K x 9 (4) 256K x 9 (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x 9 NONE NONE NONE 5MB (4) 256K x 9 (4) 1M x 9 NONE NONE 6MB (4) 256K x 9 (4) 256K x 9 (4) 1M x 9 NONE 7MB (4) 256K x 9 (4) 256K x 9 (4) 256K x 9 (4) 1M x 9 8MB (4) 1M x 9 (4) 1M x 9 NONE NONE 9MB (4) 256K x 9 (4) 1M x 9 (4) 1M x 9 NONE 10MB (4) 256K x 9 (4) 256K x 9 (4) 1M x 9 (4) 1M x 9 12MB (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 NONE 13MB (4) 256K x 9 (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 16MB (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE NONE NONE 20MB (4) 1M x 9 (4) 4M x 9 NONE NONE 24MB (4) 1M x 9 (4) 1M x 9 (4) 4M x 9 NONE 28MB (4) 1M x 9 (4) 1M x 9 (4) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 NONE NONE 36MB (4) 1M x 9 (4) 4M x 9 (4) 4M x 9 NONE 40MB (4) 1M x 9 (4) 1M x 9 (4) 4M x 9 (4) 4M x 9 48MB (4) 4M x 9 (4) 4M x 9 (4) 4M x 9 NONE 52MB (4) 1M x 9 (4) 4M x 9 (4) 4M x 9 (4) 4M x 9 64MB (4) 4M x 9 (4) 4M x 9 (4) 4M x 9 (4) 4M x 9 Note:Banks 2 & 3 are located on a memory expansion card that fits in the 32-bit expansion slot. DRAM SWITCH CONFIGURATION Size SW2/1 SW2/2 SW2/3 SW2/4 SW2/5 1MB On On On On On 2MB Off On On On On 3MB On Off On On On 4MB Off Off On On On 4MB On On Off On On 5MB On On Off Off On 6MB On Off On Off On 7MB Off On On Off On 8MB Off On Off On On 9MB On Off Off Off On 10MB Off Off On Off On 12MB On Off Off On On 13MB Off Off Off Off On 16MB Off Off Off On On 16MB On On Off On Off 20MB On On Off Off Off 24MB On Off On Off Off 28MB Off On On Off Off 32MB Off On Off On Off 36MB On Off Off Off Off 40MB Off Off On Off Off 48MB On Off Off On Off 52MB Off Off Off Off Off 64MB Off Off Off On Off EXTERNAL CACHE CONFIGURATION Size W3 W4 W15 64KB Open Open pins 2 & 3 closed 256KB Closed Closed pins 1 & 2 closed